Asian Carp appearing in one of the Great Lakes is indeed a "pretty big deal". They are the ultimate invasive species. They don't look like us. They don't think like us. Obviously, because they're fish. But they don't even look or think like indigenous fish, which we have studied and understand and are therefore capable of slaughtering in great numbers, and so have rendered pretty docile. These suckers are like fish terrorists. They can eat anything and breed like foreigners. Furthermore, they can crawl across land, leap long distances, and eat children, which might be OK if they stopped at the bad kids, but they are usually not so discerning.

(Note: I have not been able to confirm the content of this last link).

Seriously! Its bad shit! The end times are coming, and I'm just hoping they resemble one of those bush parties from back in my high-school days.

PPS. Looks like Mark Steyn got it right about the decline of civilisation, although he got the causes wrong. I don't think he mentions Carp even once, or any kind of fish. With him it seems to be Muslims Muslims Muslims, 24/7. But to prove all this I would have to read one of his books.